Speaker:
Mikio Nakahara
Title:
Spin-selective electron transfer in a quantum dot array
Time:
11:00 am.,November 25th,2019
Location:
818 Conference Room, Shahe Campus
Profile:
Mikio Nakahara is a professor at Department of Mathematics of Shanghai University. And he does research in Atomic, Molecular and Optical Physics, Mathematical Physics and Theoretical Physics.
Abstract:
Spin-selective coherent electron transfer in a silicon quantum dot array is proposed. Oscillating magnetic fields and temporally controlled gate voltages are utilized to separate the electron wave function into different quantum dots depending on the spin state. We introduce a nonadiabatic protocol based on $pi$-pulses and an adiabatic protocol (spatial STIRAP) which offer fast electron transfer and robustness against the error in the control-field pulse area, respectively. We also study a shortcut-to-adiabaticity protocol which compromises these two protocols. We show that this scheme can be extended to multielectron systems straightforwardly and used for nonlocal manipulations of electrons. We also report some of recent progress if time permits (This work is done in collaboration with Shumpei Masuda and Kuan Yen Tan).
Reference: Phys. Rev. B 97, 045418 (2018)
2018